package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websockt.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer socketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.cleanShoppingCart(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);


        //支付成功后发送websocket请求
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号:"+outTradeNo);
        String s = JSON.toJSONString(map);
        socketServer.sendToAllClient(s);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO getOrderDetail(Long id) {
        //根据id查询订单信息
        Orders orders = orderMapper.getByOrderId(id);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //属性拷贝VO实体类
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 查询历史订单
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult getHistoryOrders(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 设置分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //设置当前用户id
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();
        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page.getResult()) {
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 取消订单
     *
     * @param id
     */
    @Override
    public void cancelOrder(Long id) throws Exception {
        // 根据id查询订单
        Orders orders = orderMapper.getByOrderId(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单当前状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //获取当前用户的id
        //退款到该用户的账户下
        Long userId = orders.getUserId();

        // 订单处于待接单状态下取消，需要进行退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            // 调用退款服务进行退款操作
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额
            // 设置支付状态为已退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消订单");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderId = orderDetailMapper.getByOrderId(id);


        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> carts = orderId.stream().map(orderDetail -> {
            ShoppingCart cart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中

            BeanUtils.copyProperties(orderDetail, cart, "id");
            cart.setUserId(userId);
            cart.setCreateTime(LocalDateTime.now());
            return cart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.batchInsert(carts);
    }

    /**
     /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO getStatusCount() {
        //待接单数量
        Integer toBeConfirmed = orderMapper.getCountStatus(Orders.TO_BE_CONFIRMED);
        //待派送数量
        Integer confirmed = orderMapper.getCountStatus(Orders.CONFIRMED);
        //派送中数量
        Integer deliveryInProgress = orderMapper.getCountStatus(Orders.DELIVERY_IN_PROGRESS);

        //统计的状态封装给VO
        OrderStatisticsVO vo = new OrderStatisticsVO();
        vo.setToBeConfirmed(toBeConfirmed);
        vo.setConfirmed(confirmed);
        vo.setDeliveryInProgress(deliveryInProgress);

        return vo;

    }

    /**
     * 接单
     *
     * @param confirmDTO
     */
    @Override
    public void confirmOrder(OrdersConfirmDTO confirmDTO) {
        Orders orders = Orders.builder()
                .id(confirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.updateStatus(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejectOrder(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders orderId = orderMapper.getByOrderId(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orderId == null && !orderId.equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //获取支付状态
        Integer payStatus = orderId.getPayStatus();
        //支付状态 0未支付 1已支付 2退款
        if (payStatus.equals(Orders.PAID)) {
            //如果用户已支付，需要退款
//            weChatPayUtil.refund(
//                    orderId.getNumber(), //商户订单号
//                    orderId.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
            // 设置支付状态为已退款
            orderId.setPayStatus(Orders.REFUND);
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(orderId.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 管理端取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void adminCancelOrder(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //根据订单的id查询订单信息
        Orders orders = orderMapper.getByOrderId(ordersCancelDTO.getId());
        //获取订单的支付状态
        Integer payStatus = orders.getPayStatus();
        //判断订单的支付状态
        if (payStatus.equals(Orders.PAID)) {
//            weChatPayUtil.refund(
//                    orders.getNumber(), //商户订单号
//                    orders.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额)
        }

        //更新订单的状态 取消原因 取消时间
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void deliveryOrder(Long id) {
        //根据订单id获取订单信息
        Orders orders = orderMapper.getByOrderId(id);
        // 订单状态必须为3已接单 CONFIRMED 才能进行下一步操作
        if (orders.getStatus() == null && !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders1 = new Orders();
        //获取订单的id
        orders1.setId(orders.getId());
        //获取订单的状态
        orders1.setStatus(Orders.DELIVERY_IN_PROGRESS);

        //修改状态
        orderMapper.update(orders1);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void completeOrder(Long id) {
        //根据id查询订单信息
        Orders byOrderId = orderMapper.getByOrderId(id);

        //判断当前订单的状态  DELIVERY_IN_PROGRESS
        if (byOrderId.getStatus() == null && !byOrderId.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        //获取订单id 状态码 送达时间 (delivery_time)
        orders.setId(byOrderId.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        //修改订单状态为已完成
        orderMapper.update(orders);

    }

    /**
     * 催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
      //查询该订单是否存在
        Orders ordersDB = orderMapper.getByOrderId(id);
        //判断是否为空
        if(ordersDB ==null){
            throw  new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单的状态是否为待接单，是否已经付款状态
        if(ordersDB.getStatus()!=2 && ordersDB.getPayStatus() != 1){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //发送提醒消息
        //基于WebSocket实现催单
        Map map = new HashMap();
        map.put("type", 2);//2代表用户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + ordersDB.getNumber());
        socketServer.sendToAllClient(JSON.toJSONString(map));


    }

}

